(1915) From Dunkerque to Belport A non fiction book by Edith Wharton
That night we went up once more to the rock of Cassel. The moon was full, and as civilians are not allowed out alone after dark a staff-officer went with us to show us the view from the roof of the disused Casino on top of the rock. It was the queerest of sensations to push open a glazed door and find ourselves in a spectral painted room with soldiers dozing in the moonlight on polished floors, their kits stacked on the gaming tables.